diff --git a/dotnet/src/Microsoft.Agents.AI.Hosting/HostApplicationBuilderWorkflowExtensions.cs b/dotnet/src/Microsoft.Agents.AI.Hosting/HostApplicationBuilderWorkflowExtensions.cs
index cbefe94f1f..12be59052c 100644
--- a/dotnet/src/Microsoft.Agents.AI.Hosting/HostApplicationBuilderWorkflowExtensions.cs
+++ b/dotnet/src/Microsoft.Agents.AI.Hosting/HostApplicationBuilderWorkflowExtensions.cs
@@ -26,7 +26,7 @@ public static class HostApplicationBuilderWorkflowExtensions
     /// <exception cref="InvalidOperationException">
     /// Thrown when the factory delegate returns null or a workflow with a name that doesn't match the expected name.
     /// </exception>
-    public static IHostedWorkflowBuilder AddWorkflow(this IHostApplicationBuilder builder, string name, Func<IServiceProvider, string, Workflow> createWorkflowDelegate, ServiceLifetime lifetime = ServiceLifetime.Singleton)
+    public static IHostedWorkflowBuilder AddWorkflow(this IHostApplicationBuilder builder, string name, Func<IServiceProvider, string, Workflow> createWorkflowDelegate, ServiceLifetime lifetime = ServiceLifetime.Transient)
     {
         Throw.IfNull(builder);
         Throw.IfNull(name);
diff --git a/dotnet/tests/Microsoft.Agents.AI.Hosting.UnitTests/HostApplicationBuilderWorkflowExtensionsTests.cs b/dotnet/tests/Microsoft.Agents.AI.Hosting.UnitTests/HostApplicationBuilderWorkflowExtensionsTests.cs
index 1c5649d17c..00d6ab7aa5 100644
--- a/dotnet/tests/Microsoft.Agents.AI.Hosting.UnitTests/HostApplicationBuilderWorkflowExtensionsTests.cs
+++ b/dotnet/tests/Microsoft.Agents.AI.Hosting.UnitTests/HostApplicationBuilderWorkflowExtensionsTests.cs
@@ -63,10 +63,10 @@ public void AddWorkflow_ValidParameters_ReturnsBuilder()
     }
 
     /// <summary>
-    /// Verifies that AddWorkflow registers the workflow as a keyed singleton service by default.
+    /// Verifies that AddWorkflow registers the workflow as a keyed transient service by default.
     /// </summary>
     [Fact]
-    public void AddWorkflow_RegistersKeyedSingleton()
+    public void AddWorkflow_RegistersKeyedTransient()
     {
         var builder = new HostApplicationBuilder();
         const string WorkflowName = "testWorkflow";
@@ -78,7 +78,7 @@ public void AddWorkflow_RegistersKeyedSingleton()
                  d.ServiceType == typeof(Workflow));
 
         Assert.NotNull(descriptor);
-        Assert.Equal(ServiceLifetime.Singleton, descriptor.Lifetime);
+        Assert.Equal(ServiceLifetime.Transient, descriptor.Lifetime);
     }
 
     /// <summary>